Charles Petzold: 3D Programming for Windows (Pro - Developer)

First book devoted to WPF 3d. Adam Nathan's book has a 53-page chapter on it.

Charles Petzold: Applications = Code + Markup: A Guide to the Microsoft Windows Presentation Foundation

Now shipping. From the author that many people learned Windows Programming from.

Chris Anderson: Essential Windows Presentation Foundation (WPF) (Microsoft .NET Development Series)

Now released! Chris made a tremendous contribution to WPF as one of its chief architects. What does that perspective show? (I haven't read it yet...). SimpleGeek.com is Chris' blog.

Matthew MacDonald: Pro WPF with VB 2008: Windows Presentation Foundation with .NET 3.5 (Pro)

First VB focused WPF book!

Matthew MacDonald: Pro WPF: Windows Presentation Foundation in .NET 3.0 (Pro)

I met Matthew earlier this year at the MVP summit. Walt had good things to say abot his ASP.NET books. It has been well received.

Chris Sells/Ian Griffiths: Programming WPF

2nd edition now out. Ian and Chris had the first book on WPF back in beta1 or beta2 timeframe. Now, 8 months after WPF has been released, they've now majorly updated and expanded it.

Adam Nathan: WPF Unleashed

Now shipping. Good depth and focus on useful tips focused on common scenarions that aren't as simple as they should be in WPF. Update: very well received by devs.